Blowpipe



' Patented Dec. I3, |898.

2 Sheets--Sheet I.

H. DOCK.

BLDWPIPE.

[Application filed June 4, 1898.)'

(No Model.)

Patented Dec. I3, i898.

No.I 65,960.

H. DUCK.

BLWPIPE.

(Application med .rune 4, 199s.) I

2 Sheets--Sheet 2.

(No Model.)

UNITED STATES PATENT rricn.

HERMAN DOCK, OF PHILADELPHIA, PENNSYLVANIA.

BLOWPIPE.

ECIFICATION forming part of Letters Patent No. 615,960, dated December 13, 1898.

Application tiled June 4, 1898. Serial Nox 682,516. (No model.)

To KLZZ whom t may concern:

Be it known that I, HERMANDocK, of Philadelphia, county of Philadelphia, State of Pennsylvania, have invented an Improvement in Blowpipesmf which the followingdescription, in connection with the accompanying drawings, is a specification, like letters and figures on the drawings .representing like parts.

This invention relates to blowpipes used by jewelers, dentists, and others for soldering, brazing, rbc.; and it has forits object the production of a novel form of blowpipe of simple construction and high efficiency.

Blowpipes of various forms are now in use; but so far as I am aware in all of these the air-blast is delivered in the center of the gastlame or has its exit from the same opening, resulting in defective operation and annoyance to the user. So, too, considerable manipulation is necessary in order to operate such devices, and with many of them the pressure must be maintained substantially constant and very low or the air will blow out the fiame, such pipes failing to operate if the pressure exceeds one pound or falls below half a pound to the square inch.

I have aimed to produce a blowpipe which may loe readily and effectively operated and which will operate properly under widely-varying pressure.

I have herein shown several practical embodiments of my invention, the novel features of which will now be described, and particularly pointed out in the claims.

Figure 1, in side elevation, represents one form of blowpipe embodying my invention, the parts being shown in position` when not in use. Fig. 2 is a left-hand end elevation thereof. Fig. 3 is an enlarged vertical sectional view of the valve-controlling mechanism, taken on the line x Fig. 2. Fig. 4 is au enlarged transverse section on the line so so', Fig. l. Fig. 5 is a side elevation of another form of blowpipe embodying my invention. Figs. 6 and 7 are enlarged vertical sectional details of the controlling valves for the air and gas. Fig. 8 is a side elevation of yet another modification of my invention. Fig. 9 is an enlarged transverse sectional detail thereof on the line azi/r2, Fig. 8; and Fig. 10 is a vertical section of the air-valve to be described.

Referring to' Fig. l, the plowpipe, tool, or device comprises two tubular members a and b, pivotally connected at 5 and adapted to be connected, as will be described, with suitable f sources of supply of gas and air, respectively, preferably by iexible tubes or piping. The member a is shown as provided at its upper end with a suitable burner dx, flattened to leave an elongated exit opening or slit for the gas, while the adjacent end of the member o is provided with an air-nozzle bx, laterally extended in the direction of the length of the burner.

By reference to Fig. 4 it will be seen that the member ce has attached thereto a laterally-extended slotted bracket ce to receive a lug or ear b', attached to the member b, pivotally connected by the transverse pin or stud 5, the comparatively large coperating faces of the bracket and ear preventing any tendency of the members to twist.

Referring now to Fig. 3, a valve-case having. opposite tubular extensions a3 a4, is secured to the member a below the joint 5, the extension d3 fitting tightly therein, a plugvalve a5 sliding transversely in the case and having an annular groove d therein. The stem a7 of the valve is threaded to receive a check-nut as, which abuts against the tubularhandle B, secured to the extension b4 of the valve-case b2, attached by its extension b3 to the member or air-tube b, a like handle.

A being attached to the extension a4. The

' plug-valve b5 is similar to the valve d5, and it is oppositely turned to the latter, so that the check-uut bs on the threaded stem o7 abuts against the adjacent part of the gas tube or member a. Springs s and s surround the check-nuts between their heads and the corresponding valve-cases, the springs tending to separate the members a and b and maintaining the valves in substantially the position shown in Fig. 3, nearly closed, to produce a needle-name. A yoke C, attached to one member, embraces the other member, as shown, and limits the separation of said members due to the springs, and by adjusting the check-nuts the valves can be adjusted independently to vary the amount of air or gas, or both, passing through the tool when not in use. A second yoke C above the joint 5 serves to limit the throw or swing of the mem- IOO bers when in use, and it also acts as a guide to retain said members in alinement. l

When in use, the operator grasps the handles A and B and by the pressure of the hand presses them together, thereby automatically moving the valves oppositely in the direction of the arrows, Fig. 3, to admit more air and gas to the nozzle and. burner, respectively, the degree of pressure determining the amount, while at the same time the proper relative position of the air nozzleand burner is eiected. It will thus be seen that the tool is held in one hand and the valves controlled by simple pressure thereof, the otherhand of the operator being entirely free.

The outer ends of the valves may be either slotted or provided with knurled heads for the purpose of adjustment, both forms being shown.

The yoke C serves as a protection to the valve mechanism and also prevents accidental rotation of the check-nuts on the valvestems.

In Fig. 5 the gas and air conducting members a and Z7, with the burner ctx and air-nozzle bx, are, substantially as hereinbefore described, pivotally connected at and yokes D and D' guide and limit the relative movement of said members; but the gas and air valves are located at opposite sides of the pivot 5.

The gas-controlling valve d5 is shown in Fig. 6 and the air-valve @5in Fig. 7 oppositely turned and 4movable in opposite directions by the relative movement of the members a and b, due to pressure of the hand of the operator on the handle portions A and B, as before. Inasmuch as the valves and their cases and the coperatingcheck-nuts are substantially the same as the corresponding parts described in the foregoing specification, they need not be described in detail. A spring s2 controls the separation of the air and gas conducting members and returns the air-valve c5 to normal position, the free end of the yoke D engaging the gas-valve d5 to open it when the tool is in use.

In the modification shown in Fig. 8 the gasconducting member am, having a burner C012, is provided with a plug-cock als, (see Fig. 9,) operated by a handle (114, the valve-case L15 having screwed there-into a slotted stud al, to which is pivotally connected by a pin @17a lu g b1, secured to the air-cond ucting member bw. The member blo is shown as bent slightly below the pivot a to separate it sufficiently from the member al", asuitable spring S maintaining the separation, while a yoke E above the pivot prevents undue pivotal movement of said members and also keeps them in alinement. A grooved slide-valve f, Fig. l0, is movably seated in the air duct or member blo, its threaded shank f/ being provided with a check-nut f2 to adjust the throw of the valve, said nut being moved in one direction by engagement with the free end of the yoke E and in the opposite direction by pressure of the nut against the gas-duct al", thus dis pensing with a second spring.

In the tools shown in Figs. l and 5 the valve-cases are practically bushings enlarged between their ends to form suitable valveseats, and said valvecases may be either pressed or soldered into the air and gas conducting members. Obviously, however, the conducting members could be made in one piece, the air-tube 121 in Fig. S being so constructed and the valve-seat formed .directly in the tube.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an apparatus of the class described, relatively-movable, connected gas and air conducting members, the former being provided with a burner, an air-directing nozzle on the latter, movable toward and from the burner by relative movement of said members, an aircontrolling valve and actuating means therefor operated by such relative movement, substantially as described.

2. In an apparatus of the class described, relatively-movable,connected gas and air con= ducting members, a burner having an elon* gated exit-opening, on the gas-conducting member, an air-nozzle on the other member, movable toward and away from the burner in the direction of the length of its opening by relative movement of the main members, an air controlling valve, and actuating means therefor operated by or through such relative movement, substantially as described.

3. In an apparatus of the class described, relatively-movable,connected gas and air con ducting members, the former being provided with a burner, an airdirecting nozzle on the latter, movable toward and from the burner byrelative movement of said members, an air controlling valve, actuating means therefor operated by such relative movement, and means to limit the relative movement of the gas and air conducting members, substan; tially as described.

4. In an apparatus of the class described, tubular gas and air conducting members piv; otally connected between their ends, a burner 0n the gas member and an air-directing nozzle on the other member, a spring to normally retain said burner and nozzle in juxtaposition, and valve mechanism to control the flow of air and gas, said mechanism being automat ically operated by relative movement of the conducting members, substantially as dcscribed.

5. In an apparatus of the class described, a gas-conducting member having at one end a burner, an air-cond ucting member provided with an air-nozzle adjacent the burner, a pivotal springcontrolled connection between said members, and independently-adjustable gas and air valves, and actuating means there= foroperated by relative movement of the con ducting members,substantially as described.

6. In an apparatus of the class described,

IOU

IIO

relatively-movable and connected inliexible tubes for gas and air, said tubes at one end being provided respectively With a burner and an air-directing nozzle, the other ends of the tubes forming handles, controlling-valves in said tubes, and means operated by relative movement of the tubes to open the valves as the burner and nozzle are separated, substantially as described.

7. In an apparatus of the class described, relatively-movable,connected gas and air conducting members, the former being provided with a burner, an air-directi-ng nozzle on the latter, movable toward and from the burner by relative movement of said members, gas

and air controlling valves, a spring to normally maintain the Valves closed and the HERMAN DOCK.

Witnesses:

JOHN E. ROBERTS, R. H. WINTER. 

